ES152237A3 - Disposición para producir el ensanchamiento del tubo en las máquinas para fabricar los soportes del filamento en las lámparas eléctricas
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Disposición para producir el ensanchamiento del tubo en las máquinas para fabricar los soportes del filamento en las lámparas eléctricas
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ES152237A1941-02-271941-02-27Disposición para producir el ensanchamiento del tubo en las máquinas para fabricar los soportes del filamento en las lámparas eléctricas
ExpiredES152237A3
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